A new Federal Trade Commission lawsuit is serving as an unsettling reminder to companies that it hasn’t backed off its war against deceptive website practice—what the agency dubs “dark patterns” marketing.

The FTC in late April sued online bill paying company Doxo.com, accusing the Bellevue, Washington-based company of duping consumers into believing they were making payments through their biller’s websites, when in fact they were using Doxo’s portal and paying it fees.